Waterproofing composition



uvvl UVIIII vvl I IUIU,

UNITED STATES LACUIHHBF PATENT OFFICE.

GUS'I'US H. HAVENS, OF LANSING, MICHIGAN.

WATERPROOFING COMPOSITION.

lo Drawing.

To all whom it may concern:

Be it known that I, Gusrus H. HAvnNs, a citizen of the United States, residin at Lansing, in the county of Ingham and tate 6 of Michigan, have invented a new and useful Improvement in 'aterproofing Composition, of which the following is a specification.

My invention relates to waterproofing 10 composition and more especially to composition intended to be either mixed with the materials used in making hydraulic cement walls or blocks or to be painted upon cement surfaces for the purpose of filling the pores and making them water and moisture proof. Its purposes are to make a composition that shall be more easily applied, spread more readily, and be more efficient in its operation than those commonly used.

I am aware that for waterproofing purposes it is customary to mix with h draulic I cem t or a mixture of hydrau 1c cemen and lime. various mineral composition such as copperor iron sul hates, alu wd also orgammds such as tartarlc citri d the 11 e, ut ave oun t at y the addition of a small quantity of an organic mucilage, preferably the mucilage oer elm bark, or the ar 1 se "oow ere e composl ion is ren ere muc more e clent in operation and also is easier in application. The proportions of the various articles and of the mucilage or mucilaginous substance will vary considerably depending upon whether the composition is to be mixed with the cement itself in forming the blocks or walls or to be applied on the surface and if the latter, they will vary considerably according to the char- 40 acter and condition of the surface to which they are to be applied. All this is entirely familiar to those acquainted with the art of waterproofing cement. I also find that where the surface is very dry and porous, the mucilage is better than the finely powdered bark.

While, as stated above, I prefer powdered slippery elm or the mucilage-therefrom for the mucilaginous substance, any other substance yielding a mucilage in solution may Specification of Letters Patent. Patented J 11119 6, 1922. Application filed October 30, 1920. Serial No. 420,736.

be employed without departing from my invention.

In preparing my waterproofing compositlon for ordinary, purposes, I mix together about one and one fourth ounces of alum one and one fourth ounces of very finely owdered elm bark and one and ounces 0 c0 9 3621' so 3 late. To prepare the mixture for use I put the above in about two allons of water. To this I add ted l'me and then to the desire COIlSlS ency o the purpose for which I desire to employ it. with hvdraulic cement. As I stated above, the exacv propor1ons are not in any way material to my invention. The quantity of any one of them may be, and should be, varied considerably according to the purpose for which the waterproofing is to be employed. T artaric acid may be used instead of the per su piate, using about three fourths of an oun in places where the co) er sulphate wiid be objectionable becafi I 0 arm as my invention and desire to secure by Letters Patent:

1. A waterproofing composition containing hydraulic cement, hydrated lime and an organic mucilaginous substance.

2. A waterproofing composition containing hydraulic cement, hydrated lime and a mucilage formed from slippery elm bark.

3. A waterproofing composition containing hydiaulic cement, and finely powdered slippery elm bark. d

4. A waterproofing composition containing hydraulic cement, hydrated lime and finely powdered slippery elm bark.

5. A waterproofing composition containing hydraulic cement, hydrated lime, alum and finely powdered slippery elm bark.

6. A waterproofing composition containing hydraulic cement, hydrated lime, alum. copper sulphate and finely powdered slippery elm bark.

GUSTUS H. HAVENS.

CARL H. MCLEAN. 

